256737155 has 16 divisors (see below), whose sum is σ = 321986880. Its totient is φ = 196149888.

The previous prime is 256737149. The next prime is 256737157. The reversal of 256737155 is 551737652.

It is not a de Polignac number, because 256737155 - 2¹⁰ = 256736131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256737157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93989 + ... + 96681.

It is an arithmetic number, because the mean of its divisors is an integer number (20124180).

Almost surely, 2^256737155 is an apocalyptic number.

256737155 is a deficient number, since it is larger than the sum of its proper divisors (65249725).

256737155 is a wasteful number, since it uses less digits than its factorization.

256737155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550.

The product of its digits is 220500, while the sum is 41.

The square root of 256737155 is about 16023.0195344074. The cubic root of 256737155 is about 635.5692953977.

The spelling of 256737155 in words is "two hundred fifty-six million, seven hundred thirty-seven thousand, one hundred fifty-five".